Available for new projects · Nicosia, Cyprus

I build apps that people actually use.

Hi, I'm Orestis. A mobile and web developer who takes an idea from a first sketch to a working, secure product. Flutter, Firebase, and the web.

  • Flutter
  • Dart
  • Firebase
  • Firestore
  • PHP
  • MySQL
  • HTML · CSS · JS
Budget Lover AI advisor screen
Budget Lover home screen
Budget Lover safe to spend screen
€370 safe to spend
AI advisor
0languages in my flagship app
0complete products, built solo
0core stacks: Flutter, Firebase, PHP
100%idea to launch, one developer

Selected work

Two complete products, built end to end.

Design, front end, back end and data. No templates, no shortcuts.

Budget Lover

AI budgeting app · Android · Personal project

An app I designed and built to help people spend less and save more. It shows a daily "safe to spend" amount and has an AI advisor that answers money questions using the user's own numbers.

  • Flutter
  • Dart
  • Firebase
  • Gemini AI
  • 15 languages

Not yet released. All screens use demo data.

Budget Lover screenshot

Safe to spend

The number that matters: how much you can spend today and every day until the next payday, after bills, savings and a buffer.

Epignwsi

Recovery support community · Web app

A safe online community for people in recovery: they share how they are doing, support each other, and message privately. Built with plain PHP and MySQL, with an operator panel to manage the community.

  • PHP 8
  • MySQL
  • Bootstrap 5
  • English + Greek
  • Posts, categories, comments and likes
  • Friends, private messages and notifications
  • Profiles, settings and an operator (admin) panel
  • Security basics done properly: prepared statements, CSRF tokens, hashed passwords, permission checks

Screens show demo data only.

epignwsi.local/home
Epignwsi screenshot
Epignwsi on a phone

What I can build for you

From a simple idea to a finished product.

Mobile apps

Cross-platform apps in Flutter and Dart: smooth, fast and designed to feel native. From a finance tracker to a booking system.

Backend and login

Firebase Authentication and Firestore for secure sign-in and real-time cloud data, so your users' data syncs across devices.

Websites and web apps

Responsive sites and database-driven web apps with HTML, CSS, JavaScript, PHP and MySQL. Quick on every screen size.

AI features

Add an assistant or smart feature that works with your own data, the way the advisor and receipt scanner work in Budget Lover.

How we work together

Clear steps, no surprises.

I handle the whole project, from the first conversation to the final delivery.

  1. 01

    Understand

    We talk through your idea, your users and what success looks like.

  2. 02

    Plan & design

    A clear scope and the screens, agreed with you before I write code.

  3. 03

    Build

    I build it in steps and show you progress along the way.

  4. 04

    Test & deliver

    Careful testing, then a finished product and the source files, handed over to you.

Portrait of Orestis Stylianides
Nicosia, Cyprus

About me

Computer Science foundation, real products.

I combine a strong academic foundation in Computer Science with hands-on experience building my own complete, production-ready applications. Whether you need a secure personal finance tracker, a booking system, or a custom app built from the ground up, I can turn your concept into a fully functional product.

I'm a clear communicator and detail-oriented, and I care that what I build is secure, simple to use and easy to maintain.

  • Flutter
  • Dart
  • Firebase Authentication
  • Firestore
  • HTML
  • CSS
  • JavaScript
  • Technical project management
  • Technical support

Contact

Have an idea? Let's build it.

Tell me a little about your project and I'll get back to you.